<div class="test-container">
    <div class="test-header">Select columns to show then hit 'Apply'</div>

    <div class="test-header">
        <label><input type="checkbox" id="athlete" />Athlete</label>
        <label><input type="checkbox" id="age" />Age</label>
        <label><input type="checkbox" id="country" />Country</label>
        <label><input type="checkbox" id="year" />Year</label>
        <label><input type="checkbox" id="sport" />Sport</label>

        <label><input type="checkbox" id="gold" />Gold</label>
        <label><input type="checkbox" id="silver" />Silver</label>
        <label><input type="checkbox" id="bronze" />Bronze</label>

        <button onclick="onBtApply()">Apply</button>
    </div>

    <div id="myGrid" class="test-grid"></div>
</div>
